Here are the components of a business letter:

P.O. Box 98 (Your address)
Morristown, AZ 85342

Date

Dear_: (Salutation)

A business letter form is used to make a request, a comment or a proposal just to name a few. A business form needs to be to the point and does not contain a lot of flowery language. There is no need to indent.

Yours Truly,

Your Name